Investigation on Effects of Chain Extenders and Cross-linking Agents of Polyurethane Elastomers Using Independent Building Vibration Isolation Sensor

Abstract

Polymeric materials are used for vibration protection owing to their high-energy dissipation or adsorption. In this study, polyurethane elastomers (PUEs) were prepared using six kinds of chain extender and three types of cross-linking agent. The relationships between their structures and vibration isolation performances were investigated in detail using an independent building vibration isolation sensor. The results showed that elastomers with fewer main chain carbon atoms exhibited better vibration isolation performance. With increasing number of side groups of the chain extender, both the damping and vibration isolation properties were improved. For different cross-linkers, a more irregular structure of the cross-linkers resulted in the better vibration isolation performance of the PUEs.

Synthetic scheme to increase the abrasion resistance of waterborne polyurethane–urea by controlling micro‐phase separation

“…A previous study (Gui) 46 shows a similar trend that polyurethane with BDO will exhibit a higher compression modulus because the forming of ordered hard segments are more easily in (Figure 5(c)). For the S_PTD series, there is a higher chain‐extender content so the hard‐segment weight percentage is increased and ordered hard segments are formed.…”

“…A previous study (Gui) 46 shows a similar trend that polyurethane with BDO will exhibit a higher compression modulus because the forming of ordered hard segments are more easily in (Figure 5(c) series, there is a higher chain-extender content so the hardsegment weight percentage is increased and ordered hard segments are formed. By involving of DMBA ( Figure 5(b)), the W_PTD series show that increasing the number of side chains of the chain extender decreases the compression modulus because there is less micro-phase separation due to the steric hindrance of -COOH from DMBA.…”

High‐damping polyurethane/hollow glass microspheres sound insulation materials: Preparation and characterization

“…The bands at around 1600 cm −1 can be assigned to the vibration absorption peak of the benzene ring, indicating that the PUE has the presence of benzene ring 36 . The characteristic peak of the CO group is appeared at around 1728 cm −1 , including hydrogen‐bonded CO (1700 cm −1 ) and the free one (1730 cm −1 ) 38–40 . The fitting of the peak area of hydrogen‐bonded CO and the free one can be clearly seen in Figure S1.…”

“…36 The characteristic peak of the C O group is appeared at around 1728 cm −1 , including hydrogenbonded C O (1700 cm −1 ) and the free one (1730 cm −1 ). [38][39][40] The fitting of the peak area of hydrogen-bonded C O and the free one can be clearly seen in Figure S1. The hydrogen-bonded carbonyl group only presents in the hard segment and the free carbonyl group only disperses in the soft segment, indicating that the hydrogen bonding amount (HBA) of the carbonyl group represents the degree of microphase separation.…”

Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

“…[13,14] Studies have confirmed the positive effect of the polyols side groups and chain extenders on the damping enhancement, which can be attributed to the increase in the friction of the molecular chain. [15][16][17] Jiang et al [18] effectively increased the damping-temperature range by introducing a disulfide bond and a hanging-chain structure. The damping performance was significantly improved by the targeted design of polyurethane molecular structure.…”